什么是锅炉大联锁？
参考答案：
轮发电机跳闸锅炉自动跳闸；对应侧引风机跳闸，送风机自动跳闸；对应侧空气预热器跳闸，送引风机一次风机跳闸
简述卫气营血各分证的转归情况。
94. You are late again. To be________is one of the essential qualities we Moderners should possess.
A．polite
B．punctual
C．fair
D．Honest
